Simulation study on effect of diameter and CRH ratio of ogive nose hard missile on required critical impact energy for penetration of concrete targets

Abstract

Penetration is one of the elements in design consideration effects of the local impact damage phenomena. It has to be investigated for designing protective concrete structures in order to resist kinetic impact by hard projectile. Kinetic energy is the dominant cause of damage in moving accidents. When hard projectile collides with concrete target, it is the kinetic energy of the projectile that makes concrete target to deform. Therefore, it is vital to study critical impact kinetic energy that causes penetration (local impact phenomena). A two dimension (2D) asymmetrical numerical simulation analysis has been conducted on ABAQUS software using dynamic explicit analysis function with constitutive model of Concrete Damaged Plasticity. The simulation was to determine the critical impact energy of ogive nose hard projectile which causes maximum penetration in to the concrete structures during local impact. It was found that the simulation results are in close relation with experimental data with less than 7% error in all cases. The limitation of Concrete damaged plasticity model is it contains no failure criteria. The effects of diameter and CRH ratio of ogive nose hard projectile on critical impact energy were also analysed. It is found that bigger diameter of ogive nose projectiles requires more critical impact energy for maximum penetration of concrete target as compared to the smaller diameter of ogive nose. For small CRH ratio of hard missile, it requires higher critical impact energy for maximum penetration of concrete target. © 2011 Praise Worthy Prize S.r.l. - All rights reserved.